Had a battle with my brother. Beating the other one's record.
We started with ~30-40s were our first runs. 1min seemed impossible at that moment. I was very proud, when I managed 1:10. Then he managed 1:12 or something. Then I got to 1:13 and suddenly 1:20. I felt safe.
Then suddenly he comes up with statistics in an excel, which types of curves kill him the most and an astonishing 1:30. 1:30 felt too far, like I could never reach that. But after 5-10h of playtime stretched over one week I finally managed 1:31.
What really helped: Don't focus your eyes, keep them unfocussed, more or less in the center. Don't rush it, keep the white line near the middle, no need to keep it at the border of your screen.
This game is very addicting and has a really, really high production value!